Struggling with Confluence REST API examples

[FliceWater]

I'm trying to learn how to use Confluence's REST API. I used the example here in the doc, but it always returns "301 Moved Permanently". I thought it might be because the page had actually been moved, so I tried adding --location to the curl command from the example. Now I get '{"statusCode": 500, "message": "java.io.EOFException: No content to map to Object due to end of input"}'. What am I doing wrong?

[Stephen Deutsch · Accepted solution]

Are you by any chance using HTTP where you should be using HTTPS? Or the other way around?

[Stephen Deutsch]

I converted my comment to an answer; you can approve it now :)

[FliceWater]

That was it! Thanks so much. Please do post an answer so I can give you the points for it. Also, if you're feeling charitable, please upvote my question--I'm currently limited to three posts per day until I reach 25 points, so even posting this comment to thank you is costly for me, given that I am a beginner and have many questions.